Motorcycle armrest



FIG. 1 is a top view of a motorcycle armrest;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a left side view thereof.

The dashed lines illustrate environmental structure that forms no part of the claimed design. 

The ornamental design for a motorcycle armrest, as shown and described. 